The always hyperactive and sometimes useful theater of the absurd that is Sonyalpharumors had a new batch of reviews on the Loxia lenses. I think this one (link below) is the most informative:
#283. Zeiss Loxia 50mm f/2.0 first review | DearSusan
I'm more in the market for a 20mm focal length myself but it's encouraging (and tempting) to hear that Zeiss is providing these excellent manual focus alternatives to the FE lenses (which I also find excellent in their own and different way).